JP3471236B2 - Manufacturing equipment for pipes with protrusions - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates is, with projections pipes
It relates the manufacturing apparatus.

[0002]

2. Description of the Related Art Conventionally, pipe materials made of stainless steel have been widely used as indoor handrail materials from the viewpoint of strength, aesthetics and the like.

However, when this stainless steel pipe is used as a handrail material, the advantage that its surface is a highly smooth surface and this state is maintained for a long time, conversely suffers from slipping. It has been pointed out that it is easy to use, especially when the user is applied as a facility of a welfare facility targeting weak people in physical strength or physical function such as elderly people and people with physical disabilities. The problem becomes even more prominent.

In view of the above circumstances, conventionally, when a stainless pipe is used as a handrail material, a technique of coating the surface of the pipe with a film material having a projection has been proposed and put into practical use. Has reached the end.

[0005]

However, when the surface of a stainless steel pipe is coated with a film material in this way, the film material with protrusions is relatively expensive, and the film material with a projection is used for the pipe surface. Since the covering work is complicated, there is a problem that the manufacturing cost is high. In addition, since film materials generally have poorer strength performance and wear resistance than metal materials, the film material wears or breaks early in use and peels off from the pipe surface, making it unusable for use as a handrail, etc. There was also a problem in terms of its durability.

[0006] Therefore the present invention has been made for the purpose of providing an apparatus for manufacturing a nubbed pipes having excellent and durability at a low cost.

[0007]

In the present invention, the following constitution is adopted as a concrete means for solving such a problem.

In the apparatus for manufacturing a pipe with a projection according to the first invention of the present application , a plurality of divided pipes are formed in the circumferential direction and the abutment thereof is performed.
In this state, forming surfaces 1a and 2a having a shape corresponding to the outer peripheral surface 10a of the material pipe 10 are formed,
Together with embracing from the outer peripheral surface 10a side, a plurality of relief recesses 16, 16 of concave molded surface 1a, the molding surface 1a to 2a, radially outward from 2a, · · the molded
A plurality of molding dies 1, which are provided in multiple stages in the axial direction of the surfaces 1a and 1b .
2 and a plurality of through holes 32, 32, ... Having an outer diameter that can be inserted into the inner peripheral surface 10b of the material pipe 10 and penetrating this through the peripheral wall 31c .
2 corresponding to the escape recesses 16, 16 ,.
A support base 31 provided in multiple stages in the axial direction and the peripheral wall 3
The through holes 32, 3 of the support base 31 having a height dimension larger than the thickness dimension of 1c by a predetermined dimension.
A molding tool 3 comprising a plurality of pressing molding members 33, 33, ..., which are housed and arranged so as to be movable in the hole direction, and an inner diameter of the support base 31 in the molding tool 3. Forming peripheral surface portion 41 having an outer diameter smaller by a predetermined dimension than
In the state of being inserted into the inner peripheral surface 31b of the support base 31 from the axial direction thereof, the molding peripheral surface portion 41 engages with the plurality of pressure molding members 33, 33 ,. The pressing members 33, 33, ...
And a core metal 4 that acts so as to project outward from the outer peripheral surface 31a.

A second invention of the present application is characterized in that, in the manufacturing apparatus for a pipe with a projection according to the first invention, the pressing molding member 33 is constituted by a spherical body or an arc-shaped plate body.

[0010]

According to the present invention, the following effects can be obtained by adopting such a configuration.

[0011]   Of the present applicationFirstWith projection according to the invention of
According to the Yip manufacturing equipment,
Are manufactured.

That is, the material pipe 10 is held and fixed from the outer peripheral surface 10a side by the molding surfaces 1a and 2a of the plurality of molding dies 1 and 2, and in this state, the material pipe 10 is held. The molding tool 3 is fitted into the inner peripheral surface 10b of the pipe 10. After that, the supporting base 31 in the molding tool 3
The cored bar 4 is inserted into the inner peripheral surface 31b of the above and is moved in the axial direction.

Then, the molding peripheral surface portion 41 of the core metal 4 is formed.
Engages with each of the plurality of pressure molding members 33, 33, ... Provided on the support base 31 of the molding tool 3,
The press-molding members 33, 33, ...
Push it toward the outside in the radial direction.

In this case, since the height dimension of the pressing molding member 33 is larger than the thickness of the peripheral wall 31c of the supporting base 31, the outer surface portion of each pressing molding member 33, 33, ... The peripheral wall 10c of the material pipe 10 which projects further outward in the radial direction than the outer peripheral surface 31a and is fitted and arranged on the outer side of the support base 31 receives the pressing force by the pressing molding members 33, 33 ,. In the state of receiving and locally entering the relief recesses 16, 16, ... Provided on the molding surfaces 1a, 2a of the respective molding dies 1, 2, bulging and deforming toward the outer peripheral surface 10a side of the material pipe 10. Then, the protrusions 13 and 14 are formed by the bulging deformation portion,
A pipe with a protrusion having a plurality of such protrusions 13 and 14 is obtained.

As described above, according to the apparatus for manufacturing a pipe with a projection according to the present invention, the material pipe 10 is set in each of the molding dies 1 and 2, and the molding tool 3 is mounted on the molding dies. that Do because it can be obtained easily and reliably the protrusion-pipe in a simple operation of pushing the core metal 4 in the interior of the molding tool 3, it is possible to provide the projection-pipe lower cost with .

[0016]   Of the present applicationSecondWith projection according to the invention of
According to the ip production equipment, The effect described in
In addition to the above, the pressing molding member 33 is formed into a spherical or arc-shaped plate.
A pipe with a protrusion that has a spherical protrusion by being configured with a body
Or you can easily get each pipe with a protrusion
Projections that can be used according to the required applications and functions.
It is easy to provide the attached pipe.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, will be explained based on the apparatus for manufacturing a nubbed <br/> pipes according to the present invention in the preferred embodiment.

A: First Embodiment This embodiment relates to a projection pipe manufacturing apparatus Z ₁ for manufacturing a projection pipe X ₁ as shown in FIG.

The projection pipe X ₁ shown in FIG. 3 uses a stainless steel material pipe 10 having a predetermined diameter, and a large number of spherical projections 13, 13, ... Are formed on the outer peripheral surface 10a in a predetermined arrangement pattern. When it is used as a handrail material, it is possible to provide a handrail having a relatively soft touch. still,
If necessary, the pipe X ₁ with protrusions remains straight,
Alternatively, it is appropriately curved and used. Then, the pipe with projection X ₁ is manufactured using the pipe manufacturing apparatus with projection Z ₁ described below.

The above-mentioned pipe manufacturing apparatus Z ₁ with protrusions is shown in FIG.
As shown in FIG.
And a core metal 4.

The first molding die 1 is composed of a block body made of metal, and has a semicircular cross-sectional shape on its upper surface side, which substantially matches the shape of the lower half of the material pipe 10 to be molded. The molding surface 1a is formed. Further, on the molding surface 1a, the respective spherical projections 13 and 13 in the projection-pipe X _1, a number of escape recess 16, 16 in correspondence with the .., ... are formed in a predetermined arrangement pattern ing. The first molding die 1 is fixedly arranged on an appropriate support base (not shown) with the molding surface 1a facing upward.

The second molding die 2 forms a pair with the first molding die 1 and, like the first molding die 1, is composed of a metal block body, and the lower surface side thereof is A forming surface 2a having a semicircular cross-sectional shape that substantially matches the shape of the upper half of the material pipe 10 to be formed is formed. Further, on the molding surface 2a, the respective spherical projections 13 and 13 in the projection-pipe X _1, a number of escape recess 16, 16 in correspondence with the .., ... are formed in a predetermined arrangement pattern ing. The second molding die 2 is arranged above the first molding die 1 and moves vertically so as to come into contact with and separate from the first molding die 1 by a moving and pressing means such as a hydraulic cylinder. In addition, it is possible to maintain the abutted state with an appropriate pressing force in the abutted state with the first molding die 1.

In this embodiment, the first molding die 1 and the second molding die 2 compose the "molding die" in the claims, but in other embodiments, the division is made. The number can be further increased.

The molding tool 3 comprises a supporting base 31 and a plurality of press-molding members 3 assembled on the side of the supporting base 31 described below.
, 33, ... And.

The support base 31 is the material pipe 10 described above.
Is formed of a thick cylindrical body having an outer diameter that can be fitted into the inner peripheral surface 10b of the inner peripheral surface 10b of the inner peripheral surface 10b, and a plurality of through holes 32, 32, ... Are formed. The through hole 32 is a circular hole having a predetermined diameter.

On the other hand, the press-molding member 33 is composed of a spherical body having a diameter dimension that can be inserted into the through hole 32. In this case, the diameter dimension (corresponding to the "height dimension" in the claims) of the press molding member 33 is set to be larger than the thickness dimension of the peripheral wall 31c of the support base 31 by a predetermined dimension. .

The press-molding member 33 is fitted in the through hole 32 of the support base 31 as shown in FIG. 3, but in the fitted state of the press-molding member 33 in the through hole 32. For example, by caulking the rim of the through hole 32 and bulging and deforming the rim toward the inner side of the hole, the stopper portions 3 are formed on both rims of the through hole 32, respectively.
4 and 35 are formed. Therefore, the pressure molding member 3
3 is the through hole 3 by the stopper portions 34 and 35.
2 is prevented from falling off, and within the through hole 32, the through hole 32 is provided only within the range of the stopper portions 34 and 35.
Is movable in the hole direction (that is, in the radial direction of the support base 31). That is, as shown in the left half of FIG. 3, the “first position” protruding toward the inner peripheral surface 31b of the supporting base 31.
And the outer peripheral surface 31 of the support base 31 as shown in the right half.
It can be moved to and from the “second position” protruding to the a side.

The cored bar 4 is integrally formed of a shaft body having a different diameter, and has a molding peripheral surface portion 41 formed of a circumferential surface and a diameter gradually decreasing continuously at both axial end edges of the molding peripheral surface portion 41. The guide portions 42 and 43 are composed of changing tapered surfaces. When the core metal 4 is inserted into the molding tool 3, the outer peripheral surface 41a of the molding peripheral surface portion 41 engages with each of the pressure molding members 33, 33, ... position"
To the "second position" side, the outer diameter of the molding peripheral surface portion 41 is close to the inner peripheral surface 10b of the support base 31 of the molding tool 3 as shown in FIG. The size is set so that it is possible.

The core metal 4 is connected to, for example, a hydraulic cylinder, and is inserted into and removed from the molding tool 3 as the hydraulic cylinder expands and contracts.

The working procedure and the like in the case of processing the raw material pipe 10 to obtain the projection-provided pipe X ₁ by using the projection-provided pipe manufacturing apparatus Z ₁ configured as described above will be described.

In manufacturing the pipe X ₁ with protrusions, first, the material pipe 10 is placed between the first mold 1 and the second mold 2 that have been opened, and the material pipe 10 is placed between the first mold 1 and the second mold 1.
It is placed on the molding surface 1a of. After that, the second molding die 2 is lowered to the first molding die 1 side to abut against the first molding die 1. In this mold abutment state, the material pipe 10 is provided with the molding surface 1a of the first molding die 1 and the second molding die 2
It is held between the outer peripheral surface 10a and the molding surface 2a. This completes the setting of the material pipe 10.

Next, the inner peripheral surface 10b of the material pipe 10
The molding tool 3 is inserted therein and is fixed by an appropriate fixing means to restrict the movement in the axial direction. In this case, as shown in the right half of FIG. 3, the relief recesses 16, 16 on the side of the molding dies 1 and 2 and the pressure molding members 33 on the side of the molding tool 3, 33 ,. Positioning of the molding dies 1 and 2 and the molding tool 3 is performed so that and correspond to each other.

Thereafter, the core metal 4 is inserted into the inside of the molding tool 3 from one end side in the axial direction thereof, and the core metal 4 is sequentially moved forward in the axial direction. Then, as shown in the right half of FIG. 3, the molding peripheral surface portion 41 engages with the respective pressure molding members 33, 33, ... As the molding tool 3 moves forward,
.. are extruded from the "first position" toward the "second position". By the push-out action of the press forming members 33, 33, ..., The forming surfaces 1 of the supporting base 31 and the forming dies 1 and 2 are formed.
The material pipe 10 interposed between a and 2a
Of the peripheral wall 10c of each of the pressure forming members 33, 33,
・ ・ Only the part corresponding to is pushed out to the outside,
The relief recesses 16, 16, ... Of the molding dies 1, 2 ...
It will bulge and deform. The bulging and deforming portions become the spherical projections 13, 13 ..., And the material pipe 10 having a smooth outer peripheral surface 10a is a pipe with projections provided with the spherical projections 13, 13 ,. Its form changes to X ₁ . This completes the work of forming the pipe X ₁ with protrusions.

The projection pipe X ₁ thus manufactured and the projection pipe manufacturing apparatus Z ₁ used for its manufacture have the following unique advantages.

That is, in the case of the pipe with projections X ₁ , when it is used as a handrail material, for example, the spherical projections 13 and 1 have already been formed at the stage of the handrail material.
.. are formed, it is possible to obtain a handrail having a required anti-slip function and high durability only by manufacturing the handrail using this. Therefore, compared to the conventional case where a pipe material coated on the surface is used as a handrail material,
The manufacturing cost can be reduced and the durability can be improved at the same time. Further, in particular, since the projection provided on the projection-provided pipe X ₁ is composed of the spherical projections 13, 13, ..., A soft anti-slip action with a soft touch is realized.

B: Second Embodiment The second embodiment relates to a projection pipe manufacturing apparatus Z ₂ for manufacturing a projection pipe X ₂ as shown in FIG.

The projection pipe X ₂ shown in FIG. 4 is made of a stainless steel material pipe 10 having a predetermined diameter, and a large number of linear projections 14, 14, ... Are formed on the outer peripheral surface 10a in a predetermined arrangement pattern. When this is used as a handrail material, for example, a handrail having a high anti-slip effect can be provided.

The projection-equipped pipe manufacturing apparatus Z ₂ used for manufacturing the projection-provided pipe X ₂ is the projection-equipped pipe manufacturing apparatus Z ₁ used for manufacturing the projection-provided pipe X ₁ in the first embodiment. And the basic configuration thereof is the same, and the difference is that the pressure molding member 3
The structure is 3, 33, ....

That is, this pipe manufacturing apparatus Z with projections
₂ is composed of the respective molding dies 1 and 2, the molding tool 3 and the core metal 4, and the molding tool 3 is the above-mentioned supporting substrate, as in the pipe manufacturing apparatus with a projection Z ₁ in the first embodiment. Three
1 and a plurality of pressure forming members 33, 33, ..., In this embodiment, the pressure forming members 33, 33 ,. As described above, instead of being formed of a sphere, it is formed of an arc-shaped plate. That is, the pressure molding member 3
Reference numeral 3 denotes an arc-shaped plate body having an outer peripheral surface 33a having substantially the same curvature as the outer peripheral surface 31a of the support base 31, and the outer peripheral surface 33a is the inner peripheral surface 10 of the material pipe 10.
It functions as a deformation processing surface which abuts on b and swells and deforms it, and the inner peripheral surface 33b has an inner peripheral surface 33b.
It functions as a receiving surface that comes into contact with the molding peripheral surface portion 41 and receives the pressing force from the molding peripheral surface portion 41.

In this embodiment, the distance between the outer peripheral surface 33a and the inner peripheral surface 33b of the pressure molding member 33 corresponds to the "height dimension" in the claims. Therefore, this height dimension is determined by the peripheral wall 33 of the press-molding member 33.
It is set to a dimension larger than the thickness dimension of c by a predetermined dimension. Further, a plurality (four in this embodiment) of the press-molding members 33 are arranged at predetermined intervals in the circumferential direction of the support base 31, and in this case, the press-molding members 33 correspond to the shape of the press-molding member 33. The through hole 32 provided on the support base 31 side is also formed in an elongated hole shape extending in the circumferential direction of the support base 31.

The working procedure and the like in the case of processing the material pipe 10 to obtain the pipe with projections X ₂ by using the pipe manufacturing apparatus with projections Z ₂ having the above-described structure are generally the same as those in the first embodiment. This is the same as the case of the form, but is summarized as follows.

That is, as shown in FIG. 5, the material pipe 10 is held while being held between the molding surface 1a of the first molding die 1 and the molding surface 2a of the second molding die 2. Pipe 1
When the molding tool 3 is inserted into the inner peripheral surface 10b of 0 and is moved forward, the molding peripheral surface portion 41 of the pressing tool 33, 33, ...
Of the press forming members 33, 3 by engaging with the inner peripheral surface 33a of the
3, ... Are respectively "first position" to "second position"
Is pushed towards. And this press-molding member 3
Of the peripheral wall 10c of the material pipe 10 which is disposed between the support base 31 and the molding surfaces 1a, 2a of the molding dies 1, 2 in association with the pushing operation of 3, 33 ,. The portions corresponding to the press-molding members 33, 33, ... Are locally and linearly extruded outwardly, and are bulged and deformed into the escape recesses 16, 16 ,. Are formed into the linear projections 14, 14 ..., By which, the projection-equipped pipe X ₂ is obtained.

The other functions and effects are the same as in the case of the first embodiment, and therefore the description thereof is omitted here.

[0044] Other (1) each spherical projection in the projection-pipe X ₁ 1
.. and the linear projections 14, 14, ... In the pipe X ₂ with projections, the shape dimensions, the number of arrangements, the arrangement pattern, etc. can be arbitrarily set as required. Further, the spherical projections 13, 13, ... In the pipe X ₁ with projections and the pipe X ₂ with projections
The linear projections 14, 14, ... In the above may be optionally provided evenly over the entire area of the pipes X ₁ , X ₂ with projections or locally at a specific site. it can.

(2) In each of the above-described embodiments, the case where the material pipe 10 is a stainless pipe has been described as an example, but the present invention is not limited to this, and has an appropriate plastic workability. It can be widely applied to metal pipes such as steel pipes and aluminum pipes. Further, although the material pipe 10 in each of the above-described embodiments has been described as being configured by a round pipe having a circular cross section, the present invention is not limited to such a structure, for example, a polygonal cross-sectional shape. It is also possible to apply a square pipe with a material pipe.

(3) In each of the above embodiments, the core metal 4 has the molding peripheral surface portion 4 dimensioned to have a predetermined diameter.
1 and the axial movement of the pressing molding member 3
Although the description has been given by taking as an example a structure in which 3, 33, ... Have a predetermined action, the core metal 4 in the present invention is not limited to such a structure. Any structure may be used as long as it can apply a pressing force to the pressing molding members 33, 33, ... It is also possible to adopt a structure in which the diameter is changed by receiving pressure. Further, for example, a plurality of core bars 4 having different diameters are prepared,
By selectively using this, it is possible to easily adapt to a plurality of types of material pipes having different wall thicknesses.

[Brief description of drawings]

FIG. 1 is a perspective view of a pipe with protrusions having spherical protrusions.

FIG. 2 is an exploded perspective view of a main part of a manufacturing apparatus used for manufacturing the pipe with protrusions shown in FIG.

FIG. 3 is a cross-sectional structural view of the molding tool shown in FIG. 2 and a cross-sectional view showing a processing state using the molding tool.

FIG. 4 is a perspective view of a pipe with protrusions having linear protrusions.

5A and 5B are a cross-sectional structural view of a molding tool in a manufacturing apparatus used for manufacturing the pipe with protrusions shown in FIG. 4 and a cross-sectional view showing a processing state using the molding tool.

[Explanation of symbols]

1 is a first molding die, 2 is a second molding die, 3 is a molding tool, 4 is a core metal, 10 is a material pipe, 13 is a spherical projection, 14 is a linear projection, 16 is a relief recess, 31 is a support base. , 32 is a through hole, 33 is a press forming member, 34 and 35 are stopper parts, 41 is a forming peripheral surface part, 42 and 43 are guiding parts, X ₁ and X ₂ are projection pipes, Z ₁ and Z ₂ are projection parts. It is a pipe manufacturing device.

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Claims (2)

(57) [Claims] 1. Abutment formed by being divided into a plurality of pieces in the circumferential direction
Molding surface of a shape corresponding to the outer peripheral surface (10a) of the material pipe (10) in the state (1a), as well as embracing from the outer peripheral surface (10a) side (2a) formed above the material pipe (10) , A plurality of relief recesses (16), (16), ... which are recessed radially outward from the molding surfaces (1a), (2a) on the molding surfaces (1a), (2a). surface
(1a), (1b) a plurality of molding dies (1), (2) provided in multiple stages in the axial direction, and an outer diameter that can be fitted into the inner peripheral surface (10b) of the material pipe (10). It has a plurality of through holes (32), (32), ...
The relief recesses (16) of the molding dies (1), (2),
(16), ... Supporting bases (31) provided in multiple stages in the axial direction in correspondence with the supporting bases (31) and having a height dimension larger than the thickness dimension of the peripheral wall (31c) by a predetermined dimension and supporting the above. The plurality of through holes (32), (3
2), ... A molding tool (3) comprising a plurality of press molding members (33), (33), ... A molding peripheral surface portion (4) having an outer diameter smaller by a predetermined dimension than the inner diameter of the supporting base (31) in (3).
1), and the inner peripheral surface (31b) of the support base (31)
The molding peripheral surface portion (41) has a plurality of pressing molding members (33) in a state in which the molding peripheral surface portion (41) is inserted into the inside thereof.
(33), ...
The outer peripheral surface (31) of the supporting base (31)
An apparatus for manufacturing a pipe with a projection, comprising: a cored bar (4) that acts so as to project outward from a). 2. The manufacturing apparatus for a pipe with a projection according to claim 1, wherein the press-molding member (33) is composed of a spherical body or an arc-shaped plate body.